Cool, but a little more thought on the content rather than the presentation would improve it. For example starting with an arbitrary segment of DNA double helix and saying how "tall" this arbitrary segment is, is just silly.
Instead, it should show how _wide_ it is. And for extra coolness, keep it in frame, coiling longer and longer as you go, and eventually have the same strand, which has been with us all the time, as a specific example (e.g. human chromosome 7 or some such) by _length_